Feeley says her daughter was actually practicing a lockdown drill, hiding from a potential attacker.

She posted the photo on Facebook with the following caption:

"Politicians - take a look. This is your child, your children, your grandchildren, your great grand children and future generations to come. They will live their lives and grow up in this world based on your decisions. They are barely 3 and they will hide in bathroom stalls standing on top of toilet seats. I do not know what will be harder for them? Trying to remain quiet for an extended amount of time or trying to keep their balance without letting a foot slip below the stall door?"

The two competing measures for keeping firearms from terrorists also faced defeat along mostly party lines, with each side accusing the other of dangerous political grandstanding and inflexibility. Democrats said the GOP proposals were unacceptably weak while Republicans faulted the Democrats' plans as overly restrictive.

None of four amendments to pending legislation garnered the 60 votes necessary to advance in the 100-member chamber.